Stoker



Feb. 2, 1926. 1,571,612

W. WARD STOKER Filed August 24, 1925' 3 Sheets-Sheet 1 so 49 75 F I '"'""il,;/47 'Z' w 0 4 f wl,

` Feb. -2 1926. f 1,571,612

w. WARD STOKEF Filed August 24, 1925 s sheetsmsheet 2 w. WAR@ A STOKER Filed August 24 3 Sheets-Sheet 5 Patented Feb. 2, 19.26.

UNITED STATES WILBURT WARD, F STE. GENEVIEVE, MISSOURI.

STOKER.

Application led August 24. 1925.

To' all 'whom t may concern.'

Be it known that l, lVrLnUn'r lllnin), a citi- Zen of the United States, residing` at Ste. Genevieve. in 'the county of Ste. Genevieve and State of Missouri, have invented certain new and useful improvements in Stokers,'of which the following` is a speci lication.

The invention relates to stokers, and has as an object the provision of a stoker which may be applied to domestic heating furnaces or the like.

A further object of the invention is the provision of a stoker having means to prevent the stalling of the device when a piece of hard substance.y such as iron or slate `is caught by the cut off means.

A further object of the invention is the provision of a Stoker having the portion eX- posed to the fire provided with cooling means.

Further objects of the invention will appear from the following description when read in connection with the accompanying drawing showing an illustrative embodiment' r of the invention and wherein- Fig. 1 is a central vertical section of a hot air heating furnace with a Stoker applied thereto, and shown in side elevation.

Fig. 2 is a plan view of the stoker upon an enlarged scale. n

Fig. 3 is a front elevation of the stoker upon a larger scale than that shown in Fig. 1.

Figs. 4, 5 and 6 are horizontal sections on lines 4 4 and 5*-5 respectively of Fig. 3.

Fig. 'T is a vertical section on line 7-7 of Fig. 3.

Fig. 8 is a detail section corresponding to Fig. 7, showing a different position of parts, and

Fig. 9 is a detail section showing the action of the device when a hard substance is caught by the cut-ofil device.

As shown in Fig. 1, the device is applied to a hot air furnace 10 by being installed in an opening 11 in the casing of the furnace, and feeding through an opening 12 in the wall of the furnace above the grate.

In the form shown the stoker comprises a cylindrical portion 13 having an annular flange 14 adapted to be secured as by cap screws 15 to a` wall of the furnace. Within the cylinder 13 a fuel spreader 16 is shown in the form of a central portion, with arms 17 extending therefrom. The arms are preferably formed with a triangular section hav# Serial No. 52,002.

ing the apex directed upwardly for the purpose of spreading the fuel. The ends of the arms 1'? are secured to the walls of the cylinder 13 for purpose of support of the spreader. Channels 18 are formed in the arms of the spreader with which channels pipes 19, 2O are shown, as connected, each having a collar 21 to which a supply of cooling medium may be attached, which medium may be either air or water.

Attached to the upper portion of the spreader' 16, which is made 'cylindrical at 22 for the purpose, there is shown a cylindrical member 23 having a conical upper end 24.

To deliver fuel to the cylinder13 there is shown a hopper 25 joining a cylindrical portion 26 provided with a Hange 27, by means of which it is secured to the annular wall 23 of the cylinder 13. Y.

To deliver successive charges of fuel to the iire a reciprocating cylinder 29 is shown fitting within the cylindrical portion 26 of the hopper, and in its lowest position telescoping with the cylindrical member 23 of the spreader. Fuel may be admitted to the cylinder 29 through` an opening 30 in its wall, which opening at the lowest position of reciprocation of the cylinder 29 stands slightly below the inclined portion of the hopper 25.

To close the opening 30 in the cylinder 29, there is shown a cylinder 31 supported within the cylinder 29 by means of a bolt 32 suspended from a cross bar 33, secured between the side arms 34, 35 of the stoker frame. The bar 33 is shown as projecting through slots 36, 37 in the walls of the cylinder'29, the material of the cylinder 29 being turned outwardly to produce the slots, and to provide wings 38 which coact with rollers 39 mounted upon reduced portions of the cross bar 33 to lessen friction.

The cylinder' 31 suspended by the bolt 32 is resiliently held in its lowermost position by means of a spring 40 abutting against the cross bar 33 and against the top of the cylinder 3l. A strap 41 is shown extending upwardly and transversely from the wall of the hopper to guide the cylinder 29 in its reciprocation.

To cause reciprocation of the cylinder 29 a connecting rod 42 is sho-wn attached to the cylinder 29 by means of a cross bar 43, andV at its upper end connected to a crank 44 carried by a drive shaft 45 journaled in the upper end of the arms 34, 35. The shaft 45 is adapted to be driven by means of a ratchet wheel46, through the medium of a pawl 47 mountedupon an arm 48 loosely journaled on the drive shaft 46 and having a link 49 connected to its upper end and to a crankr *i rotation of the shaft and cause re'cipro# cation of the cylinder 29. vWhen the cylinder29` is in its lowermost fuel receiving position the lower end of the cylinder will telescope with the cylinder 23,-" whereby to effectually preventjthe escape of gas through the fuel distributing cylinder 13. Upward movement of the cylinder29 will cau"seclt` sy ure' ofthe opening 30 by coa'ctionl with the lower edge of the cylinder 31 just*L prior to the separation of the'cylinder 29 from the cylinder 23. In the uppermost position of tlie'cylinder shown'in Fig.y 8, the opening 30 is entirely closed and fuel may yflow from the cylinder 29 down into" the *cylinder 13 about the fuel spreader, and thus fall upon the grate. l l

In the event of: a hard substance being caught between the lower edge of theVV opening BOQand the endof the cylinder 31,V as in-y dic'ated"` at 55,- Fig. 9, the spring-32 will be compressed andfthe cylinder '311 will be carriedup withthe'c'y'linder 29 without damage to the mechani'sml Upon the next downwardstrokefthefpartiele will'in Inost'cases be rpassed to the fire.y y y n v Minor changesmay be made in the physi- 'cal'enfibodimenty of' the invention witlioiitv departing from its'spirit.A

IY claimt y 1. A^ Stoker comprising, yin combination, a'liollow' reciprocating' meinber adapted to deliver' successive charges of fuel to grate,

and having a fuel receiving opening, mea-ns to deliver fuel to said opening, means in the path of said member adapted to telescope therewith to prevent escape of gases while saidY opening is receiving fuel and other means teleseoping with said member to close said opening while said member is delivering fuel to the grate.

2. A Stoker comprising, in combination, a fuel spreader, a hollow reciprocating member adapted todeliver successive charges of fuel over said spreader to a-grat'e, andhaving a. fuel receiving opening, means to deliver fuel to said opening, a plug carried by said spreader adapted to telescopically close said member while said opening is' receiving fuel, and means to close said opening while said member is delivering fuel over said spreader. y

8. A Stoker comprising, in combination, a fuel spreader, a` hollow reciprocating memL ber adapted to deliver successive chargesof fuel over said spreader to a grate, and havinga'fuel receiving opening, means to deliver fuel to said opening, aplug carried by said spreader adaptedto telescopically close saidfmember while said opening is receiving fuel, and means'supported normally stationary within said member to close said opening while said member is deliveringl fuel over said spreader. y

4. A Stoker comprising, in combination; a hollow reciprocating memberl adapted to deliver successive charges of fuel to a grate, and having a fuel receiving opening, means totdeliver fuel to saidk opening, means in the path of saidV member adapted' to close the same to prevent' escape o f gases while said opening is receiving fuel, normally stationary means resiliently held within said mennber to close saidy opening while said member is delivering fuel to the grate, saidl last named means adapted to move with saidreciprocating member` when a hard substance is caught between the edge of said last named means and of said opening. n

WILBURT WARD. 

